Rbertalotto
Have posted the below information a few times on varied fora.
There are a few of us that do use a/c as a combination of solar/battery suite. We have run the Dometic a/c energy hog (1750 W) for 3.5 hours several times (it just happens that after 3.5 hours it was getting to dusk and things were cooling down). We have also run the a/c quite a few times at dusk on battery bank to get main cabin below 85 F. A window a/c only uses around 750 W and we could run this all day in the mountain west. If you are boondocking in the US South-East in summer with 80% humidity, it will be a lot different. The Aussies run something called a split-level a/c that uses a lot less energy.
We have room on roof for 2 to 3 more 235 W panels, another 500 to 700 W of solar (move some things about) and for another 4400 W-hrs) but cannot figure out a reason (OK, a reason that wife will accept). Wife is very happy with the system.
Evaporative cooler is a grand idea if you have a lot of water. This is not usually an option when boondocking in the desert.
We primarily boondock/mootchdock and have used line power once in two years (for two days) and generator not at all. We prefer to be "Goldilockers" as in "not to hot and not to cold, just right!" so we go north and/or up in elevations (up to 10,400 feet) and reverse in winter.
Reed and Elaine
2006 Chevie 3500 4 x 4 diesel (dualie) with 45 gallon auxiliary tank
1400 W of solar (90 V to controller)
Morningstar MPPT-45 (converts 90 V to 48 V)
8700 W-hrs (48 V nominal) of LFP (CALB cells), 7 kW-hrs usable
Magnum 4.0 PSWI
Mean Well 508 W converter (48 V to 12 V)